This article discusses selected issues related to American whistleblower regulation in the financial market, presented against the backdrop of historical considerations regarding whistleblower status. The choice to analyze the mechanism of reporting irregularities through practices specific to the banking and financial sectors is an important issue of law enforcement and financial market security, and also determines the reasons for the development of the whistleblower institution in the financial market. The article presents the whistleblower as an element of the market protection system, investor protection, and broader civil liberties in the USA. American law had a significant impact on the development of European solutions for whistleblower protection and status. To better understand European law, it is necessary to refer to the prototype, which in this case consists of several American legal acts, case law, and the extensive financial market regulation of the Securities and Exchange Commission. The heterogeneity of whistleblower status in the US is a significant problem and should be approached with caution, considering the purpose of these differences. The article is a synthetic study, therefore, it proposes selected, in the author's opinion, elements characteristic of the whistleblower protection system in the financial market. The genesis of the whistleblower institution in the USA required a retrospective and selective approach, paying attention to the interdisciplinary nature of the concept.